FAMILY/SURNAME, Initials (Year of publication – in brackets) Title-in italics. [Material type–in square brackets]. Collection. shelfmark. Archive/Library, City.
TURNER, P.S. (1906) Image of an Artist [Manuscript] Holden Collection. 600. Holden Library. London.
In-text citation example:
‘Direct quotations are placed in single quotations marks’ (Author’s Surname, Year of Publication, p. – followed by page number – in brackets)